 #include <unistd.h>
 #include <signal.h>
 #include <stdio.h>
void sig_alrm( int signo )
{
/*do nothing*/
}
unsigned int mysleep(unsigned int nsecs)
{
    struct sigaction newact, oldact;
    unsigned int unslept;
     newact.sa_handler = sig_alrm;
    sigemptyset( &newact.sa_mask );
        newact.sa_flags = 0;
        sigaction( SIGALRM, &newact, &oldact );
  alarm( nsecs );
    pause();
unslept = alarm ( 0 );
    sigaction( SIGALRM, &oldact, NULL );
return unslept;
}
int main( void )
{
    while( 1 )
    {
        mysleep( 2 );
        printf( "Two seconds passed\n" );
    }
return 0;
}
